Servicing The Fuel System; Spark Plugs - Toro 12003 Operator's Manual

Servicing the Fuel System

Fuel Lines and Connections
Check lines and connections every 400 hours or yearly,
whichever occurs first. Inspect for deterioration, damage, or
loose connections.
Replacing the Fuel Filter
Replace the fuel filter after every 800 operating hours or
yearly, whichever occurs first.
1. Raise the bed and support it with the prop rod.
2. Place a clean container under the fuel filter.
3. Remove the clamps securing the fuel filter to the fuel
lines.
1
Figure 27
1. Fuel filter
4. Install the replacement fuel filter to the fuel lines with
the clamps previously removed. Mount the filter so that
the arrow points toward the carburetor.

Spark Plugs

Service Interval/Specification
Replace the spark plugs after every 800 operating hours or
yearly, whichever occurs first, to ensure proper engine
performance and reduce the exhaust emission level.
Type: Champion RC 12YC (or equivalent)
Air Gap: 0.030 in. (0.76 mm)
Note: The spark plug usually lasts a long time; however,
the plug should be removed and checked whenever the
engine malfunctions.
Checking and Replacing the Spark Plug
1. Clean the area around the spark plugs so that foreign
matter cannot fall into the cylinder when the spark plug
is removed.
2. Pull the spark plug wires off of the spark plugs and
remove the plugs from the cylinder head.
3. Check the condition of the side electrode, center
electrode, and center electrode insulator to ensure that
there is no damage.
m–5322
Important A cracked, fouled, dirty or malfunctioning
spark plug must be replaced. Do not sand blast, scrape, or
clean the electrodes by using a wire brush because grit may
eventually release from the plug and fall into the cylinder.
The result is usually a damaged engine.
4. Set the air gap between the center and side electrodes at
0.030 in. (0.76 mm). Install the correctly gapped spark
plug and tighten the plug to 18–22 ft.-lb. (24–30 N m).
If a torque wrench is not used, tighten the plug firmly.
5. Install the spark plug wires.
26
0.030 in.
(0.76 mm)
Figure 28